28 inch. the highracer, with road bike wheels. Please note you need long legs to fit on it, assume a minimum body height of approx. 175 cm (max. 210 cm)
26 inch, with mountain bike wheels. Note that you need long legs to fit on it, assume a minimum height of 170 cm. This bike is at home on unpaved roads
24 inch less readily available size tires. But you can be careful from about 150 cm.
available with top handlebar, but also with bottom handlebar